Rotary pump housing and bearing mounts



1960 o. A. MEYER ETAL ROTARY PUMP HOUSING AND BEARING MOUNTS Filed Oct.25, 1956 INVENTORS Owen A. Meyer Sigurd J Andreasen BY W THEIR AGENTUnited States Patent ROTARY PUMP HOUSING AND BEARING MOUNTS Owen A.Meyer and Sigurd J. Andreasen, both of 1004 E. Wise, Bowie, Tex.

Filed Oct. 23, 1956, Ser. No. 617,834

1 Claim. (Cl. 103-126) This invention relates to improvements in rotarygear pumps, and more particularly to a rotary gear pump housing andbearing arrangement.

The life of a rotary gear pump, as disclosed in our copendingapplication, filed March 5, 1956, for Rotary Pumps, Ser. No."569,596,now Patent No. 2,833,224 can'bematerially' lengthened, and wear on thepump alleviated, by the utilization of the housing and bearingconstruction as set forth herein. The present construction enables thepumping of highly abrasive material, while maintaining the abrasiveparticles thereof out of contact with the bearings.

Various arrangements of gear pump housings and bearings have beenproposed heretofore, but these, for the most part, involved the use of acomplex casing arrangement, which added to the cost of machining, aswell as adding to the number of parts subject to wear, and increasingthe likelihood of leaking.

In the present invention, a pump casing, substantially as shown in ourabove designated co-pending application, is provided, except for the endplates and the bearing mounts.

An object of this invention is to provide an improved unitary end plateand bearing mount for a rotary pump casing.

Another object of this invention is to provide an end plate andanti-friction bearing mount for a rotary pump casing wherein thebearings are spaced apart in a fixed relation.

Still another object of the invention is to provide an end plate for arotary pump housing wherein the bearings thereof are sealed againstentrance of mud or other foreign matter.

Yet another object of this invention is to provide end plates andbearing mounts for the housing of rotary pumps which are simple inconstruction, strong, easy to assemble and disassemble, and relativelyinexpensive to manufacture.

With these objects in mind and others which will become manifest as thedescription proceeds, reference is to be had to the accompanyingdrawings in which like reference characters designate like parts in theseveral views thereof, in which:

Fig. 1 is a top plan view of the device embodying the invention, andshowing parts broken away and other parts shown in section, to bring outthe details of construction;

Fig. 2 is a sectional view taken on the line 2-2 of Fig. 1, looking inthe direction indicated by the arrows;

Fig. 3 is a sectional view taken on the line 3-3 of Fig. 2, looking inthe direction indicated by the arrows.

With more detailed reference to the drawing, the numeral 1 designatesgenerally a pump housing having end plates 2 and 4, which end plates aresecured to the pump housing 1 by means of cap screws 6. The pump housing1 has shafts 18 and 20 therein on which are fitted gear rotors 8, whichrotors 8 draw fluid through an inlet opening formed on one side of saidhousing and discharge fluid through an outlet opening formed in theopice posite side of said housing. The inlet opening and the outletopening each is surrounded by a plane face, which has bolt holestherein, which forms a companion face for a pipe flange, as is fully setforth in the above mentioned co-pending patent application.

The respective end plates 2 and 4 of housing 1 abut I against therespective gaskets 10 thereon. Each of the end plates 2 and 4 has a pairof stufling boxes 12 thereon, in which stuffing boxes glands 14 arefitted. These glands 14 surround the respective shafts 18 and 20, so asto cause a sealing action between the respective packing elements 22 andthe respective shafts and the stufling boxes 12. The packing glands 14each have a pair of stud bolts 24 passing therethrough, which stud boltsare attached to the respective end plates 2 and 4, so as to draw therespective glands 14 into binding engagement with the packing elements22. The glands 14 seal the respective shafts 18 and 20 against leakageof fluid from within the housing 1.

Each of the end plates 2 and 4 has outwardly extending arms 28, as willbest be seen in Figs. 1 and 3, which arms are made integral with therespective end plates. The arms on each of the end plates carry acylindrical bearing housing 30. The respective bearing housings 30 arepositioned on the outer ends of the respective sets of arms a spaceddistance outward from the respective end plates 2 and 4. Eachcylindrical housing 30 is a suflicient distance outward from the end ofthe stufling box 12, so that the respective glands 14 may be movedoutward to admit the insertion of packing elements 22 into therespective stuffing boxes 12, between the outer end thereof and theinner end of the respective glands.

Bearings 32 are provided in each of the cylindrical housings 30, and arepreferably of the anti-friction, ball or roller type. These cylindricalhousings 30 are provided with the respective seals 34 and 36, to preventleaking of lubricant therefrom.

Annular rubber baflles 38 surround the respective shafts 18 and 20,intermediate the outer end of the stufling box glands 14 and the innerface of the respective cylindrical bearing housings 30, which annularrubber baffles are in close fitting relation to the respective shafts,and extend radially outward therefrom a sufficient distance to deflectany mud or fluid leakage that might occur intermediate the respectiveshafts and the respective stuffing box glands. The annular rubberbaffles also serve to direct the fluid being leaked, radially outward,by centrifugal force, when the pump is running at the normal rate ofspeed.

The fluid being pumped is heavy and contains solid abrasive particles,but by the provision of the rubber baffles 38, on shafts 18 and 20 fluidthat might leak from the stuffing boxes 12 is directed radially outwardfrom the shaft, and by having the bearing mounts sealed against thefluid being pumped, the life of the pump and associated mechanism islengthened, but at the same time, a pump and pump housingare providedwhich effectively handle the material, to force this material to a pointof use remote from the place of mixing.

The pump may be driven by a gear or sprocket 40 positioned on the outerend of shaft 18, or by other conventional method. The gear rotors of thepump may be rubber covered, as indicated at '42, and which feature isshown and described in detail in our above mentioned co-pendingapplication.

While the invention has been described and illustrated in some detailfor one embodiment thereof, it is to be understood that changes may bemade in the minor details of constructions for different installationsand materials, without departing from the spirit of the invention or thescope of the appended claim.

Having thus clearly shown and described the invention, what is claimedas new and desired to be secured by Letters Patent is:

A gear pump housing having a pair of parallel shafts extendingtherethrough, on each of which shafts a gear rotor is mounted, said gearrotors being adapted to intermesh; an integrally formed end membersecured to each end of said gear pump housing, each of which end memberscomprises a plate, three arms outwardly extending from said plate, whicharms lie in a medial plane passing through the axes of said parallelshafts, and a bearing housing formed at the ends of said arms betweeneach pair thereof, said end plates each having spaced apart aperturesformed therethrough and an aperture formed through each said bearinghousing, which apertures in said end plates and in said respectivecomplementary bearing housings being in axially aligned relation, therespective ends of the respective parallel shafts extending outwardthrough the respective apertures in said end plates and into therespective complementary apertures in said bearing housings, a pair ofstufling boxes on each of said end plates, one of which stufiing boxessurrounds each of the respective shafts where it extends through therespective end plates, a packing element within each of said stutfingboxes, which packing elements surround a packing gland fitted withineach of said stufiing boxes in close fitting relation with the packingelement therein, a bearing in each of said bearing housings, whichbearings journal the respective shafts therein, a lubricant retainingseal in each of said bearing housings in position to surround therespective shafts, an annular rubber bafiie mounted on each said shaftsintermediate the stufi'ing box thereon and the bearing housing thereon,each side of said gear pump housing having an opening formed thereinwhich openings form fluid passages, said openings being in a medialplane passing through said gear pump housing between said shafts, aplane face surrounding each of said openings of said pump housing, whichplane faces have bolt receiving holes formed therein, each plane facesurrounding the respective openings being adapted to register with apipe flange or the like.

References Cited in the file of this patent UNITED STATES PATENTS therespective shafts,

1,005,586 Webb Oct. 10, 1911 1,478,417 Wottring et al. Dec. 25, 19232,070,192 Zarafu Feb. 9, 1937 2,135,308 Killam Nov. 1, 1938 2,622,945Nickle et al Dec. 23, 1952

